Tunable Single-Ion Anisotropy in Spin-1 Models Realized with Ultracold Atoms

Abstract

Mott insulator plateaus in optical lattices are a versatile platform to study spin physics. Using sites occupied by two bosons with an internal degree of freedom, we realize a uniaxial single-ion anisotropy term proportional to $(S^z{)}^2$, which plays an important role in stabilizing magnetism for low-dimensional magnetic materials. Here we explore non-equilibrium spin dynamics and observe a resonant effect in the spin anisotropy as a function of lattice depth when exchange coupling and on-site anisotropy are similar. Our results are supported by many-body numerical simulations and are captured by the analytical solution of a two-site model.

References in corpus (5)

• Many-Body Physics with Ultracold Gases
• Imaging the Mott Insulator Shells using Atomic Clock Shifts
• Experimental Realization of a Quantum Integer-Spin Chain with Controllable Interactions
• Radio-frequency dressing of multiple Feshbach resonances
• Entanglement structure of a quantum simulator: the two-component Bose-Hubbard model

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